package com.itheima.reggie.controller;


import com.itheima.reggie.common.R;
import com.itheima.reggie.utils.FileUploader;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {

   /* @Value("${reggie.path}")
    private String basePath;*/

    /**
     * 文件上传
     * @param file
     * @return
     */
   /* @PostMapping("/upload")
    public R<String> upload(MultipartFile file) {
        //file是一个临时文件，需要转存到指定位置，否则本次请求完成后临时文件会删除
        log.info("aaaaaaaaa"+file.toString());


        //获取原始文件名(将临时文件转存到本地磁盘)
        String originalFilename = file.getOriginalFilename();//a.b.c.jpg

        //动态截取原始文件名的后缀(对原始文件，重新命名，防止文件覆盖)
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));
        //使用UUID重新生成文件名，防止文件名称重复造成文件覆盖
        String fileName = UUID.randomUUID().toString() + suffix;

        //创建一个目录对象(对文件上传目录，做健壮性判断)
        File dir = new File(basePath);
        //判断当前目录是否存在
        if(!dir.exists()){
            //目录不存在，需要创建
            dir.mkdirs();
        }

        try {
            //将临时文件转存到指定位置(转存到指定文件)
            file.transferTo(new File(basePath + fileName));
        } catch (IOException e) {
            e.printStackTrace();
        }

        return R.success(fileName);
    }*/

    /**
     * 文件下载
     *
     * @param name
     * @param response
     */
 /*   @GetMapping("/download")
    public void download(String name, HttpServletResponse response){
        try {
            //读取磁盘文件，获取输入流输入流
            FileInputStream fileInputStream = new FileInputStream(new File(basePath + name));

            //获取响应字节输出流，通过输出流将文件写回浏览器
            ServletOutputStream outputStream = response.getOutputStream();

            response.setContentType("image/jpeg");


            此段代码优化成下列对拷代码
            int len = 0;
            byte[] bytes = new byte[1024];
            while ((len = fileInputStream.read(bytes)) != -1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }

            //IO流对拷(要到坐标)
            IOUtils.copy(fileInputStream,outputStream);

            //释放资源
            outputStream.close();
            fileInputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }*/

    @Autowired
    private FileUploader fileUploader;

    @PostMapping("/upload")
    public R<String> upload(MultipartFile file) {
        String fileName = null;
        try {
            fileName = fileUploader.upload(file);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return R.success(fileName);
    }
}
